Hair dye

Abstract

It is an object of the present invention to provide a safe hair dye, which has a good dyeing property and is easy-to-use, and which has less uneven dyeing and has high stability of the formulation. The present invention provides a hair dye which comprises a combination of (1) a first gel agent containing tannic acid, benzyl alcohol and xanthane gum, and (2) a second agent containing an iron salt.

The invention claimed is: 
     
       1. A hair dye, which comprises a combination of (1) a first gel agent containing tannic acid, benzyl alcohol and xanthane gum, and (2) a second agent containing an iron salt. 
     
     
       2. The hair dye of  claim 1 , wherein the first agent further contains a water soluble polymer having gelation property in addition to xanthane gum. 
     
     
       3. The hair dye of  claim 1 , wherein the second agent contains xanthane gum and/or a water soluble polymer having gelation property. 
     
     
       4. The hair dye of  claim 2 , wherein the water soluble polymer having gelation property is natural polymer or derivative thereof, cellulose derivative, or synthetic polymer or copolymer containing the same. 
     
     
       5. The hair dye of  claim 3 , wherein the water soluble polymer having gelation property is natural polymer or derivative thereof, cellulose derivative, or synthetic polymer or copolymer containing the same. 
     
     
       6. The hair dye of  claim 4 , wherein the water soluble polymer having gelation property is carboxy vinyl polymer, sodium polyacrylate, acryloyldimethyl taurine ammonium/vinylpyrrolidone copolymer, polyacryloyldimethyl taurine, guar gum, locust bean gum, hydroxypropyl xanthane gum, or hydroxypropylcellulose. 
     
     
       7. The hair dye of  claim 5 , wherein the water soluble polymer having gelation property is carboxy vinyl polymer, sodium polyacrylate, acryloyldimethyl taurine ammonium/vinylpyrrolidone copolymer, polyacryloyldimethyl taurine, guar gum, locust bean gum, hydroxypropyl xanthane gum, or hydroxypropylcellulose. 
     
     
       8. The hair dye of  claim 1 , wherein the iron salt is ferrous sulfate, ferrous chloride, ferrous acetate, ferric sulfate, ferric chloride, or ferric acetate. 
     
     
       9. The hair dye of  claim 1 , wherein the content of the tannic acid is 0.01 to 5% by weight based on the total weight of the first agent, the content of the benzyl alcohol is 0.5 to 20% by weight based on the total weight of the first agent, the content of the xanthane gum is 0.5 to 10% by weight based on the total weight of the first agent, and the content of the iron salt is 0.5 to 10% by weight based on the total weight of the second agent. 
     
     
       10. The hair dye of  claim 1 , wherein the first agent further contains an organic compound or plant extract which reacts with iron to develop color, in addition to tannic acid. 
     
     
       11. The hair dye of  claim 1 , wherein the first agent further contains an antioxidizing agent. 
     
     
       12. A method for dyeing hair, which comprises adding the hair dye of  claim 1  to hair.